Bumper means



l June 3,1930..

E. A.` RosxN E'r AL BUMPER MEANS Filed March 9, 1929 3 Sheets-Sheet l Jurie 3, 1930. l E.' A. ROSINET AL 1,761,747

BUMPER MEANS Filed March 9, 1929 s Sheets-sheet 2 June 3, 1930. E. A. RoslN ET AL. 1,761,747

BUMPER MEANS Filed March 9, 1929 3 sheetsfsheet 5 v @a u 'lll' Z5 E :1. f "2- Z 64 66 67 SW1/070 1f." dwf/ A, P06/'n Kor/ /c/pferschmid 4 Patented June, 1930 4,. 1-natifsn stares rar-snr orties gewinn. eosin Ann Kann :appresso-tintin, or metano, OHIO., Assternons To Lineair- 'Jwnns ausencia-Pang carotene, onto, Aconzeoiaiiron or omo BUMPER Msn-Ns vApplication tiled March 9,

i This inventionrelates to apparatus for use in the ,surfacingofysheetkglass and lis of Vutility'vgfhekn inconpolfated in the continuous Y 'system wherein the grinding and polishing 5 o-f the glass isac'complished in a straightavvay operation. l l

f nsuch system, afpluralityof-glass sheets to befsurfacedare supported upon a train of 'cars or carriers and passed iirst beneath a lQsSeries-of'grind'ing units and then beneath a series `ofjpolishingunits. Ordinarily7 at least two substantially paralleltracks are used and la series of grinding `and polishing units may be :mounted above either one or bothtracks. le? When. surfacing units are mounted above bothtracks,l it may loer said that they constitutetvvo Workingtracks, the sheets beingcarried'along one-tvrack'to` surface one side thereof, after Which the sheetsare vturned over-and` F Vpassedwin the oppositedirection Aalong `the 1 second track .tos'urface the second side.

'However, When the surfacing units are mounted vabove only one track, this track is termed the Working track, :While the adjacent ytrackis termed the return track. After the glass-sheetssare. carried` upon the cars along' the*working track to :surface the'upper sidesr thereof, the :cars are transferredto the return track and carried rearwardly vto the opposite- 39; end! thereof Where they are' again transferred' tothe frontend ofthe vvorking trac'kyrtbe Y sheets. being removed from the cars, turned' oven' and'relaid thereon, after 'which the cars neathitlie surfacing units to grind an'd'po'lish Vthesecmul side of the sheets. l

fAcc'ording-to the fpnese'nt inventionythe j Vmeansfor i transferring the cars from the ,afwerking :track to the v return track and vicev Y volves the provision .of impnovedmeans 4car-V yby the turn-table for checking the Ymovedi nieitfof-rthe carsl Wherebyto fbrmg 'thesame are again passed along the Working track bel Ver@ embodies a* tunnstable connecting the v to bring the car v:into alignment With'the adj a-y 1929. Serial No. 345,770.

to a stop when they reach a substantially predetermined position thereupon land for effectively maintaining them insuch position during rotation ofsaidturn-table.

Another objectvof the invention involves the provision of novel bumper `or buiting means' carried by the turn-table` and con# structed andopera-ble'to check the movement of the cars as they are run thereupon in such a manner whereby the cars can be gradually brought to a stop Without any undue jolting, violent shock. or sudden abruptness.

A 'further object of the invention involves the provision` of substantially fixed means disposed in the course of travel ofthe bumper or hutingmeans for effecting automatic movement thereof out of operative position with respect .to the cars When the turn-table is moved: to bring said cars to a position Where they are adapted .to be runV or moved therefrom -onto the main ytracksof the system.

,Other objects and advantages of the inverntion `Twill become more appanentduring tlmr course tof the following description when taken in connect-ion ywith the accompanying. drawings." v f lnlthe drawings forming a partvof thisap plicaton and vwherein like numerals are emk"ploye'dr todesignatelike parts throughout the sa-me,- f

Fig. l is a plan viewoffapparatus provided by vthepresent invention illustratedfin assoeiation with a turntable. i

."Eig.-2isa section taken substantially on line 2 2 ofFig. l showing portions -of the v appara-tus in elevation and the lglass supportingcar or carrier in broken lines.

- Fig; `S'is .ailongitu'dinal vertical section: through ith-e hydraulicbumperlper se. i

. Fig. 4v is a transverse section taken substantialliylon'line of'Fig. 3.

Fig. 5:i's,a section taken linei-L ofFig.4. y

Gris aidetailjelevation ofthe apparatus for effecting movement of the bumperout of operative position with respect to-the'-cars.jVV Fig. Tis a sectiontaken substantiallyfon. linefeff'? of Figrand I ,s ,l Fig". is section taken substantially on line rofslg .i .l Y, l

Substantially on y its ` Referring toY the Ydrawings .and particular- Y i ly to Fig. 1, the numerals 10 and `11 designate the tWo substantiallyv :parallel Vmain tracks such as are usedin the continuous system for surfacing sheet glass. y,A series'of vgrinding and polishing 'units' (not shown) may be mounted above. either one orboth Vof these tracks` as desired. However, fory they purpose of illustration, let us assumethat the grinding and polishing units areV arranged above only the track 10y which Will therefore be termed theMWo-rking track,.WhileitheV track 11 will be termed the return track.

. vl/lountedto run upon the 4tracks 10 and V11 are a pluralityof cars or carriers 12. These cars are usually, arranged in a continuousv line and are adaptedl toc-arrya pluralityof glass sheets secured `upon the vupper surfaces thereof, along the Working trackfirstvbeneatha series ofgrinding units and then beneatliaA vseries vof polishing units. The cars are'then transferred from the Working track 10tothe'.

'return track11,and passed` rearwardly tothe opposite end thereofwhere they are again f transferred'toltheA front end ofthe Working -trackgf'Before ,the cars are again passed along thervvorking track, however,the glass sheetsV areremoved therefrom, turned overv again, secured thereto so `as to presenttheir unground and unpolished sides uppermost." The transfer means herein providedkfor effecting the transfer of the cars or carriers from'th Working' trac-k 10 to theyreturn'V track l1v at one end of said tracks and .vice

versa lat the' opposite .end of saidtracks, embodies Va turntableextendin'g between and connecting the tracksat their corresponding' ends; f rThe turn-table atopposite ends of thev :tracks Aare preferably .the same so that only oneV of them" Will be yshoWnand described.

The turn-table is designatedin itsV entirety bythe numeral' l13v and'comprises-an annular j .ring plate 141 Supporting 'thereupontheffour Ytrack 10 and-"lisothatthecars can be 're-v moved from one .main track'tand p moved -onto' relatively vshort track Sectionsy 15,1116, 17 18, said track sections adapted to be Ysucces-fsively' brought kinto alignment With the Workingftrack 10. and return track lluponrotation the turntable.' 1 n 'i' l iliA's shownrin Fig. 1, onev of thek carslQ is being movedfrom the Working track lOfonto the turntable-and up.ontrack section 15 While4 vanother is" :being simultaneously moved fromtrack sectionflf( the turntable `onto Y the returngtra'ck 11, A third car is'mounted 1 upon track'se'ction 16 Will be' kbrought to a'v discharge position-7.7infalignment with the returntrack upon a `quarter turnV ofthe turntable .in the ldirection indicated bythe arrow# .Thus upon :each quarterjturnvofthe turni;l

table, onefoff lthetracksections thereon Will rbeV brought vinto Yalignment ,with each main the opposite main track.l

f- Therotation of the turntablev ef-l'.

As aboveV tion embodies novel and improved means for checking'the movement of the cars or carriers." Vvas they are moved yonto the turn-table so that the carsvvillrbe'brought to a stop when theyV reach a, pre-determined position v thereon andY beA prevented from being accidentally discharged from eithery end thereof Vduring the r rotation of saidturn-table To this end, there l isassociated Witheach turn-table track sec-A fectedginany preferred manner ysuchasby 1 means of a motor or other prime' mover 19 having `operative connections WithV and drivff; ing the drive pinion 20 meshing With airing Y gear 21 carried by said turn-table at the inner edgethereof ,n V brought `out,thepresentinvention 15110.18 anovel bumper or buiiing means I designated in its `entirety vby the numeralr22gy l I* i' Asill'ustrated inv F ig. 2, `each buffing Vmeans comprises Vaj-substantiallyl horizontal recessedV platform or plate QScarriedlby Aorformed integral with the turn-table and havingja de-k oendinG-bearino ortion yQtftvithin `which' is slidably mounted 4thefverticalsupporting f stem VV25. This `stem ispreferably lhollow rand hasarranged therein acompression spring 26, I ,Y n secured at'its lower end toa block 27'and 'at L o f its upper end to a VplateV orcapfQ.i The block 27 is secured'in fixed position by oppositely directed trunnions '29 passing throughV ver- -tical slots SO in stem and secured Within the bearing lportion Thus, the-compression springQG Will normally tend to urge the stem 25 upwardly'butthesaid stemWill also 'l 'be' permitted vertical downward', movement l by reason of the vertical VslotsBO'.AV w.

*Carried upon tha-Pref endA of supporti-if I i* ing Stern 25 isa. horizontally disposed @yl'mr der 31., vvithinjvvhich ismounted the 'horizon-f talplun'ger 82 jslidable through Vthe end. plates 433 andltof sai'dcylinder. y"Arranged,With-VA g inv thecylinder-Bl'and encircling lthe plunger -v82 isa'fconipression spring 35, retainediat` one f end 'against the end plate andbearing at j Vits opposite end against anannular flan'ged formed on `planger 32 intermediate its ends.`v`r f Thezrki'ght 'hand end lof plunger` BQis adapted Y p tolnormallyproject'forwardly 'beyondjthe K' cylinder 'and vtoenga'ge the Aadjac'nlt"endfofV i' car 12When saidcar is inovedlfuponV theturnvv table. A TheplungerSQ therefrom; will beiI'lQdfupon reference ber orspring cushion 48 may beprovidedl toy Eigfthat the ldiameter of the flange v36 isslightlyless then theinternal diameter of Vcylinder31:50 thatk a small yclearance space isfprovidedfbetween theperiphery vof the yiangeLand thewall vof said'cylinder.V Carried/by thel iange ,forwardly thereof is av packing ringel heldin place.' by nut 42 and adapted to engage the innery sur-face of the cylinder.- c Y i f f Inthe operation of `the .apparatus thus 'Y far' describetLthecylinder 8l is adaptedv to bezilled-with a suitable fluid such vas oil,

water, xetc. .and the' compression spring 35 is.,;adapted lto:normally 4force and yield ably maintain the plunger inV its forward position as vindicated by the full lines in Fig. 3; The car y12is ,thenV` drawn konto the turntable fromlthe working track l() and when itire'aches apredetermined position theref upon, the forward end ofv thecarabuts the` 1 plungerl 32 and forcespthe same rearwardly against theactioniof s pringr and in so doing-places this spring under compression.

, Uponirearwardmovement of plunger 8:2, thel Huid wlthinthe cyllnder passes forwardly of flangeithrough the clearance spacearound the l,periphery;,thereof vand. also past the peck- Y ing ring :41.11Asthe plunger recoils due to the ,action of the compression spring, the fini d atitheifrontof theflange-B passes rearwardly through the duct 3,7.r The packing ring 41 is so arranged that it will permit the for# ward passageofftheiiuid but will prevent rearward passagethereof lBy properly ade justing the needle lvalve 89. the recoil ofthe plungercanzbe effectively regulated and con-1 `-the. car. ,:With'such a construction, it willbe apparent that the carcan be effectively trolled, fthe plunger being adapted to move forwardly muc'hfslower than it is compressed whereby to .prevent or minimize rebound of;

broiightrto a stop when yit-reaches a predeterminedposition upon-the turntable without .undue jolting Yor violent"shocl which nmightt-endto injure thesame Y "lfo prevent "the` carv 12 from VVmoving rearwardly after itghasbfeen brought into position upon1V the' turnltabflathere maybe pro-V vide'dal'atch meinberl-S fhaving'ial pivotal mounting asiat ytljbetWeen spaced ears45 on platfo Vfp jrefera'bly''the 4car ,engaging and retaining .--Qeleinent lpi'voted ated andcarrying vav rean. *Fwa'rdly `exten'dirig' arni147 having a weight' j V18"at'-itsfjonter endl.' 'llhen thecar is :moved 23:5l Thistlatfch member comprises ontoffthezturntable,` the saidffcar- ,e'ngaging element@ vWillY @permitted to' rock "to 'the c, ,-leftebout s pvot aises toa/11W the forwe d ren o the car lto pass thereby but is iprevented from moving tothe right so that it t direction jupon i'oitationr off the turnftable or i Gli:

will-*hold ,the naragenst nlroveinent in that snoudranyinbound.ofgtheearfoecur. Hihiiub-- to absorb the shoclrof the'weight 48.

Formed in the cylinder 31 intermediateits ends is a transverse passage 49 within the outer end of which is secureda block 5,0.

having a transverse open-ing 51 communicating with passage 49 through an intermediate duct 52. The duct 52 is normallyclosed by yinner end the leather or fiber disk orwasher 5,9` and normally urged inwardly by a compression spring 60. Also Acarried by housing 5 7 is av ball -valve fitting 6l preferably of a conventional type `to 'permit the introduction of ilnid therethrough into thehousing but whichY will prevent the passage ,of the iiuid outwardly thereof. The arrangement above described is provided `so ,that the desired amount ofiluid will at all times be maintained within the cylinder 31 and further, so ,that as ,any iluidy leaks therefrom more fluid will be automatically forced therein yto take its place. When itis desired to fill thc cylinder 31,`the iuid may be'forcedthrough the fitting 61 into housing 57 andthence through coupling 56,opening 51, duct 52-and passage i9 into the cylinder. proper. insurrcunding relation to plunger 32. Suflcient iinid" is also introduced intothehousing 57 to vforce the plunge'rf58 rearwardly against the-action of spring 60 and place this spring under compression.k kUpon ,continued operation of the lbumper,asmall amount of fluid may gradually seep along Vthe plunger 32 and leaky from the cylinyder through the endplates 3B and 34. As

words, the luidcontained within housing 57 may betermed a reserve supply to compensate for any Vfluid lost'from cylinder 31; yIf desired,.in order to' facilitate andexpedite the initial filling yof the cylinder,V `the fluidmay beV introduced thereinto throughv an opening AlOQthe *opening being then closed by means of a suitable plug. In all events, when the cylinder is being filled, the plugs should .beremoved from the lopeningO to allow for *the exhaustof the air from said cylinder.

" .Aftelthefturnl-table 13 has been rotated;

flo

' vided by the present invention orserving'r and Vit isl desired todischarge theglass supr` v porting car 12 Vtherefrom onto thefreturn track 11, it will be apparent that the .bumper means `must first be moved' out'o operative position with respect to said'car so' thatthe car can be moved past the samefg'lhisi is herein'accomplished by etfecting'the lower# ing of thefcylinder. 3 1Vand Vassociatedparts and this'can be easily `done sincel thefsame Vis*l carried at Vthe' upperv end ofthe vertically'j movingsupporting stem 25.V Themeans prothis purpose is entirely automatic in its oper ation and to'this end, the bearing portion 24 is provided atits lower'end with spaced de pending ears, 62 between which is received the rockerV arm 63 pivotally securedv thereto Y intermediate its ends by means of the pin 64.- The inner fend oi" arm "63 is bifurcated to provide the spaced legs 65 and 66 which ein brace thelower end` otsupporting stem 25 Vand are secured thereto by the" transversev4 pin 67.' "The pin167r'looselycarriesV atv either end asubstantiallyV square bushing' or` the like f 68 sli'dably receivediwithin the slot 69 formedv i in the legs 65 and 66. The slots 69 are preterably somewhatlarger lengthwise than bush' ingsl 68 so as to permit the proper sliding.

" 7 and,l the outerend '70 ythereof projects; at*y action between the bushings and the arms when the latter are rocked about their'pivot point 64 to move the supporting stem verti-'py cally.,y The arm 63 is curvedas shown in Fig.

substantially right angles to the inner end.

' Carried lat thefouter-end 70 of the ,arm is vroller 71.k Y .l

- Mounted'beneath the turntable 13 and preferablyl in the position indicated by the Y broken lines in F ig. 1 is the cam member 72 having the raised cam- 'ace 73 ,upon which the roller 71 carried (by, arm`63 is adapted to i' lride. Thus, as the turn-table is rotated toY bring theV .track section. carrying the car` 12 into alignment with the return .track sothat thecar upontheturn-table track section may kbe moved therefrom, the roller. 71 riding upV on thecam face 7 3 will actto rockthearm 63 about its pivot 64 and eectv a lowering of the supporting stem25' and bumper carried -therebyiy The rotation ``ofthe turn-table is"Y Ysotimed that it will be brought to astop when theroller isat thehighestpoint'of the` -cam-faceiasindicatedin ig. 6,. vThe ,car-v can then vbe moved from. the turn-table. after "'-Whrich the said Aturnetable is again'rotated;kv Y As theI roller 71 rides vdownthe `opposite' sidey of the Acam ace,the,supportingstem willbe forced upwardly by'theaction of springj26 to project thefbumper into' operativeposition. gl nThe arm .V63 iscurvedand the member 72 i placedy at tlie-angleindicated in Fig-21` so Athat' the rotationof the turntablef e VVAt times,fit may be `found desirable tohbld`4 the bumper in `its loweredl'pOjsitionthe the rollel-lwill rideupon the latter *cluriuvlgf Y 4. Y In 'tl'i'eS coi'itinuousvv system `forfsr urfacin "sheet glass,fithe combination withftwofsub Y stantially 'parallel tracks, Vglass supfpo'rt'i'ng i @MS 'adapted-Etf? IVUIlf` 110mgSadtracks,Tand Q j vl "i a "turn-table vconnecting lthe tracks at'V` {thleirf I endsand-or eiiecting the transfer ofthev cars i Y `fromonetrackto the othenofmeanscarried; s i l platform i' 23d-isfthereforel'provided vwith a Y horizontal opening Y74 adapted-'to 'register with the ope'ninginfendplate V330iV cylinder s, Y

31 when the saidcylinder vislowered;."'llhlfla1 Y a'suitable pin orretainingelement may-be; passed through the open,in'gf ,74v and intothel' when it isv desired to hold the bur'n'per`A down,

opening in .end plate 33.l 'f

n' Y u is .eofbeunueesaod' that.' the fera lof; l 'Y 'f the' invention herewith shown and described 1K is to be takenas ythepreferred embodiment f or the same, and that variousi'changes inthe shape, size and arrangement of parts may be resorted to without departing from theV spirit of theinvention or thehs'cope ofthe sub-` t joined claims."i 'y s l lVelclaim'- l 1. lin the continuous sy'temf'for surfacing i;

,sheet glass,vr the combinationy with. two "sub-1 Vstantially` parallel`r tracks,glasssupporting" lcars adapted tol runalongv said/tracks, and,

`a turntable connecting the tra'cks at theirlekr.'` ends and for effecting the transfe'rf,oit/theV f, .Y f cars fromone track tothe other, of means i carried bythe Vturntable Vfor arresting the movement olif'thecars and'bringing' such Ycars i to a stop when they reach a; `substantially` predetermined position thereupon.,y f-

2.Y ln the continuous system for surfacing Vsheet glass, the combination with two 'subu` 95 fk f Y stantiallyy parallel tracks, Lkglass supporting! Y Y cars adaptedto run alongfsaidtracks,'and aV Y turn-table Vconnecting the tracks at their ends ,y ff y and V:for leiecting thetransfer of the'fycarsl fromonetracktotheother, of means carried, by the -turnetable for bringingthe cars to a stop and preventing their'further movement in one direction when said4 cars reach a sub# stantiall'y predetermined position'thereupon, and'separate means also carried by the turnioa table for'pleventing movement of the cars in Y the opposite direction.

3. `lnthe continuous syste'md'lfor surfacingI sheetl glass, .the combinationwith two subthe cars upon "movement the rkturni-,tabl to bring-'said cars ,to a discharge position.l

' f'turntable for bringing the carsto aY Y stop and preventing their further movement in one direction When said cars reach a substantially predetermined position thereupon, separate means also carried by the' turn-table for preventing movement of the cars inthe op-y posite direction, and means acting automatically ton'iove the vfirst namedy meansout of operative position with respect to the cars upon movement of the turn-table to bring said cars to adischargeV position.

5. In the continuous system for surfacing sheet glass, the combination with two substantially parallel tracks, glass supporting cars adapted to run along said tracks, and a turntable connecting the tracks at their ends f l and for effecting the .transfer of the cars from one track to the other, of a yieldable bumper means carried by the turntable and arranged in the path of the cars and adapted to stop thesame when they are moved to a substantially predetermined'position thereupon.

' 6. In the ycontinuous system for surfacing sheet glass, the combination with two substantially parallel tracks, glass supporting lcars adapted to run along said'tracks, and a termined positionfthereupon, and means for automaticallymoving the bumper'means vertical'ly out of operative position with respect r to the'cars upon movement of the turn-table .to bring said cars to a discharge position.

7. In the continuoussystem for surfacing sheet glass, the combination with' two substantially parallel tracks, r glass supporting cars adapted to run along said tracks, and

ra turn-table connecting-the tracks at their ends and for Veectingfthe transfer of the cars from one track to the other, of al yieldable bumper vmeans carried by the turn-table and feo arranged in the path 'of the cars and adapted to stop the same and prevent further movement thereofl in one'direction when they are moved toa substantially predetermined position thereupon, and separate means also carried by the turn-table for preventing movement ofthe cars in the opposite direction.

8. In the continuous system for surfacing sheet glass, the combination with two sub stantially parallel tracks, glassk supporting cars adapted to run along said tracks, and a turn-table connecting the tracks at their ends and for eecting the transfer of the cars from one track to the other, 'of a yieldable bumper means caried by the turn-table and arranged in thepath of the cars and adapted to stop they same and preventv further movement thereof in one direction when they are moved to a substantially predetermined position thereupon, separate means also carried by the turntable for preventing movement of the cars in the opposite direction,meansforautoL mat'ically moving the bumper means verti# cally outof operative positionewith respect to the cars upon movement' ofthe turn-table to bring vsaid carsto adischarge position;

9; vIn the' continuous systeml for surfacing sheet glass, `the combination Vvsf'ithtwo' substantia-ily parallel tracks, glass supporting carsadapted to'run along said tracks, anda turn-tableconnecting the tracksr at theiry ends 'andhfor eniecting'tlie transferfof the cars from one track to1theotherf,-of yieldable bumper means carried by the'turn-table'and located inthe pathof travel ofthe cars' for engaging the same and stopping the movement thereof assaid ycars are movedto a predetermined position thereupon, means for :supporting said yieldablebumper means, and means for `mov`ing said supportingmeans Avertically `*to I assaid cars are'moyed -tofaipredeterminedpcf sition thereupon, means fer supporting said bumper means, L and means acting automatically to actuate the supporting ymeans to low# erthebumper means out of 'the path ofthe cars alpen movement'- yof the turn-table" to 'a predeterminedposition, said mean-s including a rocker arm connected 'at lonel end ywith the' 'supportingmeana and -a cam member upon which said rocker arm is adaptedtoride.

f il. In thecontinuous system for'surfacing sheet-glass, the 4combination with AtwoV Asubstantially parallel tracks, ,glass supporting cars adapted .tornai alongsaifd tracks, and a turnltable connecting-the tracks at their ends and for effecting the transfer of the cars from one track to the other, of a yieldable bumper means carried by the turn-table and arranged in the path of the cars and adapted to stop the same when they are moved to a predetermined position thereupon, means for automatically lowering the bumper means out of the path of the cars upon vmovement of the turn-table to bring said cars to a discharge position, and means for again projecting the bumper means upwardly into the path of the cars upon further rotation of the turn-table.

12. In the continuous system for surfacing sheet glass, the combination with two substantially parallel tracks, glass supporting cars adapted to run along said tracks, and a turn-table connecting the tracks at their ends and for effecting the transfer of the cars from one track to the other, of a vertical supporting y Ystem slidably carried `by ftheturnj-table, a

Y hydraulic bumper supported` at the upperend of the stein and located infthe path of travel ofthecars orengagingthe same and'lstop-l v ,5 ping the movementthereof assaid cars are Y brought to a predetermined position upon said v turn-table, a rocker armpivoted tothe turntable intermediate its ends and also connected at` its inner end to said supporting stem, and

l i (lo a Xed cam ymember disposed inthe path of travel of the arm as the turn-table is vvrotated and having; a cam Vface uponwhich the outer end of said arm is adapted to ride to `eect a lowering vofthe supporting stem and bumperl l out of thepath of the oars.

1 3. Inthe continuoussystem orsurfacing sheet glass, the combination with'two substan-` tially parallel tracks,l glass supporting cars ladapted to run along saidtracks,;and a turn-V c tableconnecting the tracks at their ends and for effecting the transfer of the cars from one track to the other, of. a verticaly supporting Y c stem slidably .carried bythe turn-table, a2 c hydraulic bumper supported at the upperend V of the stem and located inthe path of travel of the cars orfengagingthesame and stopping' the movement thereof asc-said cars are brought toY a'predetermined position upon said turn-table, al rocker-arm pivoted tothe V, turntable intermediate its ends and also con-V nected at its innerv end tov said supporting l Y stem,v` a liXed cam member disposed in the path of -travel of the arm as the turntable isV 1rotated'and having a cam'faceuponwhich the outer end of said arm is-adapted to ride to y eect a lowering of the supporting stem and bumper out of the pathofthe cars and means for-again projecting the supporting stem and i bumper upwardly into thepath of the koars Y a Y 40 when thearm passes .out 01E.engagement:withf the Cam member. f Y c Signed at Toledo, in the county Vot Lucas,

and State of Ohio, this 2nd day oi'Marclii,

'4,5' EDWINA-RosIN. Y

KARL KUPFERSCHMID 

